Expanded octet

(Polar molecules, Non-polar molecules, etc.)

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manasa933
Posts: 72
Joined: Fri Sep 29, 2017 7:04 am

Expanded octet

Postby manasa933 » Thu Nov 23, 2017 10:41 pm

How would you know whether an atom has an expanded octet?

Nhan Nguyen 2F
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 1 time

Re: Expanded octet

Postby Nhan Nguyen 2F » Thu Nov 23, 2017 11:37 pm

For expanded octet, you should know that elements in period 3 and above are able to have beyond a full set of valence electrons and that Boron has less than an octet.

Leanne Wong 1H
Posts: 50
Joined: Tue Oct 10, 2017 7:13 am
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Re: Expanded octet

Postby Leanne Wong 1H » Thu Nov 23, 2017 11:40 pm

You know an element has an expanded octet when it has any d orbitals. This is because d orbitals are able to hold more electrons than s and p orbitals.

Mitch Walters
Posts: 45
Joined: Fri Sep 29, 2017 7:07 am

Re: Expanded octet

Postby Mitch Walters » Fri Nov 24, 2017 12:28 pm

Just look to see if the atom has access to a d-orbital, that’s the biggest clue you will get!

Janice Xiao 1I
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Re: Expanded octet

Postby Janice Xiao 1I » Fri Nov 24, 2017 1:22 pm

Anything in the third row and beyond can have an expanded octet.

Aliza Ajmal 1D
Posts: 25
Joined: Fri Sep 29, 2017 7:05 am

Re: Expanded octet

Postby Aliza Ajmal 1D » Sat Nov 25, 2017 10:57 pm

The d orbital starts in period 3. Period 3 and beyond is where expanded octets can be observed

Connor Kelligrew 2D
Posts: 39
Joined: Fri Sep 29, 2017 7:07 am

Re: Expanded octet

Postby Connor Kelligrew 2D » Sat Nov 25, 2017 11:10 pm

Also if an atom is at a lower energy, more stable state when an expanded octet is applied to one of the elements in the atom. So a quick lewis structure can double check if an element uses and expanded octet


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